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added solutions for week 2
This commit is contained in:
Lars Brünjes
parent
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commit
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4 changed files with 200 additions and 0 deletions
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@ -41,6 +41,13 @@
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- Fix and complete the code in the [Homework1](code/week02/src/Week02/Homework1.hs) module.
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- Fix and complete the code in the [Homework2](code/week02/src/Week02/Homework2.hs) module.
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## Solutions
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- Week #2
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- [`Homework1`](code/week02/src/Week02/Solution1.hs)
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- [`Homework2`](code/week02/src/Week02/Solution2.hs)
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## Some Plutus Modules
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- [`PlutusTx.Data`](https://github.com/input-output-hk/plutus/blob/master/plutus-tx/src/PlutusTx/Data.hs), contains the definition of the `Data` type.
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@ -16,6 +16,8 @@ library
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, Week02.Homework2
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, Week02.Gift
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, Week02.IsData
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, Week02.Solution1
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, Week02.Solution2
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, Week02.Typed
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build-depends: aeson
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, base ^>=4.14.1.0
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90
code/week02/src/Week02/Solution1.hs
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90
code/week02/src/Week02/Solution1.hs
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@ -0,0 +1,90 @@
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE TypeOperators #-}
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module Week02.Solution1 where
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import Control.Monad hiding (fmap)
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import Data.Map as Map
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import Data.Text (Text)
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import Data.Void (Void)
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import Plutus.Contract hiding (when)
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import PlutusTx (Data (..))
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import qualified PlutusTx
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import PlutusTx.Prelude hiding (Semigroup(..), unless)
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import Ledger hiding (singleton)
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import Ledger.Constraints as Constraints
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import qualified Ledger.Scripts as Scripts
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import qualified Ledger.Typed.Scripts as Scripts
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import Ledger.Ada as Ada
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import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage)
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import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
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import Playground.Types (KnownCurrency (..))
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import Prelude (Semigroup (..))
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import Text.Printf (printf)
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{-# INLINABLE mkValidator #-}
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-- This should validate if and only if the two Booleans in the redeemer are equal!
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mkValidator :: () -> (Bool, Bool) -> ValidatorCtx -> Bool
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mkValidator () (b, c) _ = traceIfFalse "wrong redeemer" $ b == c
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data Typed
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instance Scripts.ScriptType Typed where
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type instance DatumType Typed = ()
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type instance RedeemerType Typed = (Bool, Bool)
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inst :: Scripts.ScriptInstance Typed
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inst = Scripts.validator @Typed
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$$(PlutusTx.compile [|| mkValidator ||])
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$$(PlutusTx.compile [|| wrap ||])
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where
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wrap = Scripts.wrapValidator @() @(Bool, Bool)
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validator :: Validator
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validator = Scripts.validatorScript inst
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valHash :: Ledger.ValidatorHash
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valHash = Scripts.validatorHash validator
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scrAddress :: Ledger.Address
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scrAddress = ScriptAddress valHash
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type GiftSchema =
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BlockchainActions
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.\/ Endpoint "give" Integer
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.\/ Endpoint "grab" (Bool, Bool)
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give :: (HasBlockchainActions s, AsContractError e) => Integer -> Contract w s e ()
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give amount = do
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let tx = mustPayToTheScript () $ Ada.lovelaceValueOf amount
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ledgerTx <- submitTxConstraints inst tx
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void $ awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ printf "made a gift of %d lovelace" amount
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grab :: forall w s e. (HasBlockchainActions s, AsContractError e) => (Bool, Bool) -> Contract w s e ()
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grab bs = do
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utxos <- utxoAt scrAddress
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let orefs = fst <$> Map.toList utxos
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lookups = Constraints.unspentOutputs utxos <>
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Constraints.otherScript validator
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tx :: TxConstraints Void Void
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tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData bs | oref <- orefs]
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ledgerTx <- submitTxConstraintsWith @Void lookups tx
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void $ awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ "collected gifts"
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endpoints :: Contract () GiftSchema Text ()
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endpoints = (give' `select` grab') >> endpoints
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where
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give' = endpoint @"give" >>= give
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grab' = endpoint @"grab" >>= grab
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mkSchemaDefinitions ''GiftSchema
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mkKnownCurrencies []
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101
code/week02/src/Week02/Solution2.hs
Normal file
101
code/week02/src/Week02/Solution2.hs
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@ -0,0 +1,101 @@
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveAnyClass #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE TypeOperators #-}
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module Week02.Solution2 where
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import Control.Monad hiding (fmap)
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import Data.Aeson (FromJSON, ToJSON)
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import Data.Map as Map
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import Data.Text (Text)
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import Data.Void (Void)
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import GHC.Generics (Generic)
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import Plutus.Contract hiding (when)
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import PlutusTx (Data (..))
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import qualified PlutusTx
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import PlutusTx.Prelude hiding (Semigroup(..), unless)
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import Ledger hiding (singleton)
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import Ledger.Constraints as Constraints
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import qualified Ledger.Scripts as Scripts
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import qualified Ledger.Typed.Scripts as Scripts
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import Ledger.Ada as Ada
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import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
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import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
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import Playground.Types (KnownCurrency (..))
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import Prelude (Semigroup (..))
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import Text.Printf (printf)
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data MyRedeemer = MyRedeemer
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{ flag1 :: Bool
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, flag2 :: Bool
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} deriving (Generic, FromJSON, ToJSON, ToSchema)
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PlutusTx.unstableMakeIsData ''MyRedeemer
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{-# INLINABLE mkValidator #-}
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-- This should validate if and only if the two Booleans in the redeemer are equal!
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mkValidator :: () -> MyRedeemer -> ValidatorCtx -> Bool
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mkValidator () (MyRedeemer b c) _ = traceIfFalse "wrong redeemer" $ b == c
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data Typed
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instance Scripts.ScriptType Typed where
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type instance DatumType Typed = ()
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type instance RedeemerType Typed = MyRedeemer
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inst :: Scripts.ScriptInstance Typed
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inst = Scripts.validator @Typed
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$$(PlutusTx.compile [|| mkValidator ||])
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$$(PlutusTx.compile [|| wrap ||])
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where
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wrap = Scripts.wrapValidator @() @MyRedeemer
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validator :: Validator
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validator = Scripts.validatorScript inst
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valHash :: Ledger.ValidatorHash
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valHash = Scripts.validatorHash validator
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scrAddress :: Ledger.Address
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scrAddress = ScriptAddress valHash
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type GiftSchema =
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BlockchainActions
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.\/ Endpoint "give" Integer
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.\/ Endpoint "grab" MyRedeemer
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give :: (HasBlockchainActions s, AsContractError e) => Integer -> Contract w s e ()
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give amount = do
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let tx = mustPayToTheScript () $ Ada.lovelaceValueOf amount
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ledgerTx <- submitTxConstraints inst tx
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void $ awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ printf "made a gift of %d lovelace" amount
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grab :: forall w s e. (HasBlockchainActions s, AsContractError e) => MyRedeemer -> Contract w s e ()
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grab r = do
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utxos <- utxoAt scrAddress
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let orefs = fst <$> Map.toList utxos
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lookups = Constraints.unspentOutputs utxos <>
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Constraints.otherScript validator
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tx :: TxConstraints Void Void
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tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData r | oref <- orefs]
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ledgerTx <- submitTxConstraintsWith @Void lookups tx
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void $ awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ "collected gifts"
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endpoints :: Contract () GiftSchema Text ()
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endpoints = (give' `select` grab') >> endpoints
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where
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give' = endpoint @"give" >>= give
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grab' = endpoint @"grab" >>= grab
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mkSchemaDefinitions ''GiftSchema
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mkKnownCurrencies []
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